Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752012AbWAEGFA (ORCPT ); Thu, 5 Jan 2006 01:05:00 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752016AbWAEGFA (ORCPT ); Thu, 5 Jan 2006 01:05:00 -0500 Received: from mx1.redhat.com ([66.187.233.31]:30636 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S1752012AbWAEGE7 (ORCPT ); Thu, 5 Jan 2006 01:04:59 -0500 Date: Thu, 5 Jan 2006 01:04:27 -0500 From: Dave Jones To: Andi Kleen Cc: Arjan van de Ven , ck list , linux kernel mailing list , vojtech@suse.cz Subject: Re: 2.6.15-ck1 Message-ID: <20060105060427.GE20809@redhat.com> Mail-Followup-To: Dave Jones , Andi Kleen , Arjan van de Ven , ck list , linux kernel mailing list , vojtech@suse.cz References: <200601041200.03593.kernel@kolivas.org> <20060104190554.GG10592@redhat.com> <20060104195726.GB14782@redhat.com> <1136406837.2839.67.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1357 Lines: 31 On Thu, Jan 05, 2006 at 02:22:37AM +0100, Andi Kleen wrote: > Arjan van de Ven writes: > > > > sounds like we need some sort of profiler or benchmarker or at least a > > tool that helps finding out which timers are regularly firing, with the > > aim at either grouping them or trying to reduce their disturbance in > > some form. > > I did one some time ago for my own noidletick patch. Can probably dig > it out again. It just profiled which timers interrupted idle. > > Executive summary for my laptop: worst was the keyboard driver (it ran > some polling driver to work around some hardware bug, but fired very > often) , followed by the KDE desktop (should be mostly > fixed now, I complained) and the X server and some random kernel > drivers. > > I haven't checked recently if keyboard has been fixed by now. it was a little further down the list from the others I posted, but it is still there fairly high in the list of offenders, even though I wasn't touching keyboard/mouse (in fact, it was several feet away from me, I had ssh'd to it for tests). Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/